4.
    发明专利
    未知

    公开(公告)号:BRPI0408143A

    公开(公告)日:2006-03-01

    申请号:BRPI0408143

    申请日:2004-02-24

    Applicant: BASF AG

    Abstract: A method for the production of polyesterols with reduced reactivity (I) by polycondensation of dicarboxylic acids or their derivatives with H-functional substances in presence of tin catalysts, involves bringing (I) into contact with oxygen after the end of the esterification reaction. An independent claim is also included for polyesterols obtained by this method.

    8.
    发明专利
    未知

    公开(公告)号:DE102005014032A1

    公开(公告)日:2006-09-28

    申请号:DE102005014032

    申请日:2005-03-23

    Applicant: BASF AG

    Abstract: The present invention relates to a two-stage process for preparing polyesterols, which comprises the following process steps: a) preparation of at least one base polyesterol by reaction of in each case at least one dicarboxylic acid with in each case at least one polyhydroxyl compound, b) reaction of the base polyesterol from a) or a mixture of the base polyesterols from a) with at least one enzyme and, if appropriate, additionally with polyhydroxyl compounds. The invention further relates to a polyesterol obtainable by the above process.

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